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samus_pd: Skip pericom detection if we're sourcing VBUS

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If we're sourcing VBUS, there is no need to proceed with the pericom
debounce / reset procedure, since we know that we're not charging.

BUG=chrome-os-partner:37137
TEST=Manual on Samus. Insert USB keyboard, verify that pericom reset
doesn't occur. Insert SDP port + Apple charger, verify that pericom
reset / redetection still occurs.
BRANCH=Samus

Change-Id: I1a616f6e2287cd474b94e8fb61c19514d2ec2042
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/254140
Reviewed-by: Alec Berg <alecaberg@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2015-02-26 09:39:41 -08:00
committed by ChromeOS Commit Bot
parent c7bc5965fa
commit 28b1446813
1 changed files with 20 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
board/samus_pd/board.c
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@@ -160,6 +160,7 @@ void set_usb_switches(int port, int open)
void usb_charger_task(void)
{
int port = (task_get_current() == TASK_ID_USB_CHG_P0 ? 0 : 1);
int vbus_source = (port == 0 ? GPIO_USB_C0_5V_EN : GPIO_USB_C1_5V_EN);
int device_type, charger_status;
struct charge_port_info charge;
int type;
@@ -169,9 +170,14 @@ void usb_charger_task(void)
/* Read interrupt register to clear on chip */
pi3usb9281_get_interrupts(port);
/* Set device type */
device_type = pi3usb9281_get_device_type(port);
charger_status = pi3usb9281_get_charger_status(port);
if (gpio_get_level(vbus_source)) {
/* If we're sourcing VBUS then we're not charging */
device_type = charger_status = 0;
} else {
/* Set device type */
device_type = pi3usb9281_get_device_type(port);
charger_status = pi3usb9281_get_charger_status(port);
}
/* Debounce pin plug order if we detect a charger */
if (device_type || PI3USB9281_CHG_STATUS_ANY(charger_status)) {
@@ -213,19 +219,19 @@ void usb_charger_task(void)
charger_status = pi3usb9281_get_charger_status(port);
}
if (PI3USB9281_CHG_STATUS_ANY(charger_status))
type = CHARGE_SUPPLIER_PROPRIETARY;
else if (device_type & PI3USB9281_TYPE_CDP)
type = CHARGE_SUPPLIER_BC12_CDP;
else if (device_type & PI3USB9281_TYPE_DCP)
type = CHARGE_SUPPLIER_BC12_DCP;
else if (device_type & PI3USB9281_TYPE_SDP)
type = CHARGE_SUPPLIER_BC12_SDP;
else
type = CHARGE_SUPPLIER_OTHER;
/* Attachment: decode + update available charge */
if (device_type || PI3USB9281_CHG_STATUS_ANY(charger_status)) {
if (PI3USB9281_CHG_STATUS_ANY(charger_status))
type = CHARGE_SUPPLIER_PROPRIETARY;
else if (device_type & PI3USB9281_TYPE_CDP)
type = CHARGE_SUPPLIER_BC12_CDP;
else if (device_type & PI3USB9281_TYPE_DCP)
type = CHARGE_SUPPLIER_BC12_DCP;
else if (device_type & PI3USB9281_TYPE_SDP)
type = CHARGE_SUPPLIER_BC12_SDP;
else
type = CHARGE_SUPPLIER_OTHER;
charge.current = pi3usb9281_get_ilim(device_type,
charger_status);
charge_manager_update_charge(type, port, &charge);